The state or quality of being watchful; alertness, vigilance or wakefulness.

Fully observant, vigilant, or aware.

plural of watchfulness

(nautical) The regular alternation in being on watch and off watch of the two watches into which a ship's crew is commonly divided.

A portable or wearable timepiece. / The act of guarding and observing someone or something. / A particular time period when guarding is kept.

(transitive, intransitive) To look at, see, or view for a period of time. / (transitive) To observe over a period of time; to notice or pay attention. / (transitive) To mind, attend, or guard.

present participle of watch

The act of one who watches.

simple past tense and past participle of watch

Wearing a watch.